e642c95ab6
EFI GOP has support for multiple different bitness types of frame buffers and for a special "BLT only" type which is always defined to be RGBx. Because grub2 doesn't ever directly access the frame buffer but instead only renders graphics via the BLT interface anyway, we can easily support these adapters. The reason this has come up now is the emerging support for virtio-gpu in OVMF. That adapter does not have the notion of a memory mapped frame buffer and thus is BLT only. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_EFI_GOP_HEADER
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#define GRUB_EFI_GOP_HEADER 1
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/* Based on UEFI specification. */
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#define GRUB_EFI_GOP_GUID \
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{ 0x9042a9de, 0x23dc, 0x4a38, { 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a }}
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typedef enum
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{
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GRUB_EFI_GOT_RGBA8,
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GRUB_EFI_GOT_BGRA8,
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GRUB_EFI_GOT_BITMASK,
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GRUB_EFI_GOT_BLT_ONLY,
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}
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grub_efi_gop_pixel_format_t;
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typedef enum
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{
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GRUB_EFI_BLT_VIDEO_FILL,
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GRUB_EFI_BLT_VIDEO_TO_BLT_BUFFER,
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GRUB_EFI_BLT_BUFFER_TO_VIDEO,
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GRUB_EFI_BLT_VIDEO_TO_VIDEO,
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GRUB_EFI_BLT_OPERATION_MAX
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}
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grub_efi_gop_blt_operation_t;
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struct grub_efi_gop_blt_pixel
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{
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grub_uint8_t blue;
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grub_uint8_t green;
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grub_uint8_t red;
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grub_uint8_t reserved;
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};
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struct grub_efi_gop_pixel_bitmask
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{
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grub_uint32_t r;
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grub_uint32_t g;
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grub_uint32_t b;
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grub_uint32_t a;
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};
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struct grub_efi_gop_mode_info
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{
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grub_efi_uint32_t version;
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grub_efi_uint32_t width;
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grub_efi_uint32_t height;
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grub_efi_gop_pixel_format_t pixel_format;
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struct grub_efi_gop_pixel_bitmask pixel_bitmask;
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grub_efi_uint32_t pixels_per_scanline;
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};
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struct grub_efi_gop_mode
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{
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grub_efi_uint32_t max_mode;
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grub_efi_uint32_t mode;
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struct grub_efi_gop_mode_info *info;
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grub_efi_uintn_t info_size;
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grub_efi_physical_address_t fb_base;
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grub_efi_uintn_t fb_size;
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};
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/* Forward declaration. */
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struct grub_efi_gop;
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typedef grub_efi_status_t
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(*grub_efi_gop_query_mode_t) (struct grub_efi_gop *this,
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grub_efi_uint32_t mode_number,
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grub_efi_uintn_t *size_of_info,
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struct grub_efi_gop_mode_info **info);
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typedef grub_efi_status_t
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(*grub_efi_gop_set_mode_t) (struct grub_efi_gop *this,
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grub_efi_uint32_t mode_number);
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typedef grub_efi_status_t
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(*grub_efi_gop_blt_t) (struct grub_efi_gop *this,
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void *buffer,
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grub_efi_uintn_t operation,
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grub_efi_uintn_t sx,
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grub_efi_uintn_t sy,
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grub_efi_uintn_t dx,
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grub_efi_uintn_t dy,
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grub_efi_uintn_t width,
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grub_efi_uintn_t height,
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grub_efi_uintn_t delta);
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struct grub_efi_gop
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{
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grub_efi_gop_query_mode_t query_mode;
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grub_efi_gop_set_mode_t set_mode;
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grub_efi_gop_blt_t blt;
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struct grub_efi_gop_mode *mode;
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};
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#endif
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